Sanding-machine.



A. S. SPAULDING.

SANDING MACHINE.

APPLICATION men FEB. 26, 1915.

Patented June 8, 1915.

THE NOFJRIS PETERS 60., PHOm-LITHQ. WASHINGTON. D. O

ALGERNON S. SPAULDING, OF WORCESTER, MASSACHUSETTS, ASSIGNOR T0 THOMAS & COMPANY, INC., A CORPORATION OF MASSACHUSETTS.

SANDING-MACHINE.

Specification of Letters Patent.

Patented June 8, 1915.

To all whom it may 007L061 n Be it known that I, ALoERNoN S. SPAULD- ING, a citizen of the United States, residing at WVorcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Sanding-Machine, of which the following is a specification.

This invention relates to a sanding machine for the purpose of sand-papering fiat surfaces particularly, although capable of other uses.

The principal objects of the invention are to provide a simplified machine for this purpose in which the article to be sand-papered can be moved along a work-rest or support conveniently arranged, and will be accu-' rately and uniformly sanded; to provide a construction in which only a portion of the surface of the sanding wheel can project through the work-rest into a position to en-- gage the work; to provide for adjusting the work-rest so as to get a higher or lower surface speed of the sanding wheel to operate upon it; and to provide other features of construction as will appear hereinafter.

Reference is to be had to the accompanying drawings in which,

Figure 1 is a front elevation of a machine constructed in accordance withthis invention; Fig. 2 is an end elevation; Fig. 3 is a central sectional View on the line 33 of Fig. 1; Fig. 4 is a horizontal sectional view on the line 14 of Fig. 1; Fig. 5 is an enlarged sectional view of the edge of the sanding wheel; and Fig. 6 is an enlarged central sectional view of the support and adjusting device for one end of the sanding wheel shaft.

The machine is shown as comprising a frame 10 having bearings for the horizontal sanding wheel shaft 11. This shaft is shown as provided with the usual tight and loose pulleys for the reception of a driving belt. On the front of the frame 10 is a wall or plate 12 through which the shaft passes. This is provided with end walls 13. This constitutes a casing for the conical sanding wheel 14. This wheel is fixed on the end of the shaft 11 and is made of a comparatively fiat conical shape on its operative surface. This surface is provided with a layer of felt 15 and with a sheet of sand-paper 16 over the same. This is held at the center bya nut and washer 17 and at the edge by a band 18 an inclined flat work-rest 24: located above.

the front plate 20. This is held to the projection 23 on both sides by pins 25 passing into the same through the end pieces l3and it is secured to theseend pieces at the top by similar pins 26.

the conical surface of the. wheel is inclined from a plane at right-angles to .the shaft. In other words, it is substantially tangential to the conical surface of the wheel... It is provided with a segmental opening 27 therethrough which receives the wheel and allows a portion of the wheel to project through it. This opening is arranged with its center coincident with an element of the conical surface of the wheel, and thus permits this element to project through it., Of course, in practice, the parts are adjusted so that more of the wheel than simply an element extends through this opening. The wheel projects through just sufficiently to polish the flat surface of a board or the like held against the work-rest. In this way the work-rest furnishes a support on both sides of the opening for the work, and the wheel will grind it down to a uniform flat surface, as will be understood readily.

In addition to the work-rest-itself, I provide a work-support. in the form of a shelf or plate 28. This is carried by the work-- rest at right-angles thereto and is secured to it by screws 29 or the like. This can be adjusted up and down the surface of the worlorest so that an article resting on it and I on the work-rest can be operated upon at any desired distance from the center of the wheel. In this way, it will be understood that the surface speed of the portion of the wheel that operates on the work can be varied simply by varying the distance of the work-support 28 from the center of the wheel and without changing the speed of rotation of the wheel. This is a convenient thing because it is easy for the workman to This work-rest .is de-- signed to receive the work against its front surface and 1s inclined at the same degree as.

get the maximum speed of operation without burning the work.

The wheel opening can be made by cutting out the opening 27 roughly and then putting it up against the wheel and allowing the wheel to rotate and grind it to the proper shape, but if desired, the edges of this opening may be formed of two metal pieces 29 secured to the work-rest and conformlng to the shape of the rest of the same. It will be noted that these, as well as the adjacent surfaces, are concave on the back.

The wheel can be adjusted longitudinally in one direction by means of an ad usting screw 30 engaging a fiber disk 31 at the end of the shaft 11. It does not have to be ad justed in the other direction because the work pressing on it will hold it back against this screw.

I From this it will be seen that in this very simple manner a device is provided which afl 'ords an opportunity for varying the sur-- face speed of the operation without operatingany of the ordinary speed-changing devices; which provide for polishing the work uniformly on the surface; and which is of a much 'more simple form than the devioes for'sanding now on the market.

, Although I have shown and described only a single form of the invention, 1 am aware of the fact that many modifications i can bemade therein by any person skilled in the art without departing from thescope of the invention as expressed in the claims. Therefore I do not wish to be limited to all the details of construction herewith shown and described, but

V What I do claim is c '1. The combination with a sanding wheel constituting a cone having an obtuse angle at the apex, of a flat work-rest having a se mental opening therethrou'gh, through V whichthe wheel projects...

2. The combination with a sanding wheel constituting a cone having an obtuse angle at the apex, of a fiat work'rest-lo'cated sub stantially transverse to the axis of the wheel and tangent to the conical surface of the wheel, and having an opening through it through which the'wheel projects slightly.

3. The combination with a conical sanding wheel of a comparatively flat shape, of

'- a flat work-restlocated with its operative surface substantially tangent to the conical surface of the wheel,and having a segmental openlngthrough the same from the center of the Wheel to its edge, whereby the wheel can project through the opening and have a surface thereof slightly beyond said oper- V ativesurface and parallel'therewith.

4c. Thecombination with a conicalsand- .ing wheel, of a flat work-rest located substantially tangent to the conical surface of ing the speed of thesanding surface on the work. I r V a r 6.'The combination with a-conical sanding wheel, of a flat work-rest having a segmental opening therethrough, through which the wheel projects, and a casing in which said wheel is located, said work-rest constituting a wall of said casing and being re movably vconnected with the remainder of i the casing.

7. The combination of a casing having two removable front plates, one at the bottom and the other atthe top, the top plate being inclined and having an opening'vertically arranged therethrough but wider at the top than at the bottom, a horizontal shaft projecting into said casing, and a conical sanding wheel mounted on the end of said'shaft in the casing and. projecting;

through said opening.

8. The combination of a casing having two removable front plates, one at the bottom and the other at the top, the tpp plate being inclined and having an opening vertically arranged, ahorizontal shaft projecting into said casing, a conical sandingwheel mounted on the end of'said shaft in thecasing and projecting through said opening, a

work-support mounted on the frontof the inclined plate for receivingwork thereon,

said work-support being adjustable up and down the plate for bringing the work into contact with surfaces of the sanding wheel running at different surface speeds. 7

9. The combination of a casing having two removable front plates thereon, one at the bottom and the other at the top, thetop plate being inclined and having an opening vertically arranged, a horizontal shaft projecting into saidcasing, a conical sanding wheel mounted on the end of said'shaft in the casing and pro ecting through said opening, and means for adjusting said shaft to ward said inclined plate. 7

In testimony whereof I have hereunto set hand, in the presence of twosubscribing witnesses. 1

ALGERNONS. SPAULDTNG. I

v Witnesses:

ALBERT FLIP-A1, C. FORREST Wnsson.

Copies of this patent may rte obtained for five cents eaclnhy addressing the Commissioner of Patents,

Washington, D. G. 

